Friends,
This may go NOWHERE, but as I encountered this thread, and have been mentioning strange happenings with pianos of late...(like termites....), I felt it may do to mention the use of the prepared piano, or better, the Piano as a NEW INSTRUMENT...Some may be aware of other modern users including in popular music....
I did yesterday mention Ruined pianos, and suggest you listen to a few things for example, at Amazon...The person performing on accordion and ruined piano is one of the founding members of WARPS (World Association for Ruined Piano Studies...), Ross Bolleter, and his piano use on many different, often totally ruined pianos is GREAT!...In addition his use of the accordion in new ways is also world recognized...Note that this is "ruined" pianos, not prepared pianos...His "Crow Country" is a widely acclaimed album....
Another founder was Stephen Scott, Composition Professor at Colorado College...A forward looking and thoroughly modern University. His Development of an ensemble for performance on "Bowed Piano", a development dating from the early 1990's, is a great new sound, internationally acclaimed....(I have visited the campus for a major seminar, and have a niece attending there...It is much more than a good school...)
To see the method for this ensemple, and to hear a sample..(You will scroll down and click on "Sun Catcher..."), go to:
https://www.coloradocollege.edu/dept/MU/bowedpiano.htmlRegards, John